ELECTRICAL AND ECU
Warning Devices
12-12 6LY3 Service Manual
© 2007 Yanmar Marine International
Sensors for Oil Pressure and Boost
Pressure
The oil pressure sensor is located on the oil filter
bracket and the boost sensor is located on the
intake manifold.
An oil pressure switch is not used. Data from the oil
pressure sensor is used by the ECU for alarm
indication instead of an oil pressure switch.
Figure 12-15
Figure 12-15
1 – Diaphragm
2–Cap
3–R 1/8
4 – Connection
5 – Pressure Sensitive Element
6 – Housing Body
Alarm Diagram for Oil Pressure
Figure 12-16
Figure 12-16
Sensors for Water, Oil and Fuel
Temperatures
The water temperature sensor is located on the
exhaust manifold near the thermostat.
A water temperature switch is not used. Data from
the water temperature sensor is used by the ECU
for alarm indications instead of a water temperature
switch.
The oil temperature sensor is located on top of the
oil cooler. The fuel temperature sensor is located
on the side of the fuel injection pump
(Figure 12-17).
Figure 12-17
Figure 12-17
Oil Pressure Sensor Specifications
Part No. 119578-91300
Output DC 0.5-3.5V
Operating Pressure 0-1 MPa (0-145 psi)
(3)
(4)
(5)
(2)
(6)
(1)
0006280
0006297
200 kPa
(29 psi)
20 kPa
(2.9 psi)
1000
rpm
3000
rpm
Alarm OFF
Alarm ON
Alarm Diagram of Oil Pressure
Water, Oil and Fuel Temperature Sensors Specifications
Part No. 119254-44910
Rated Voltage DC 5V
Operating Temperature -30°C (-22°F)~ +120°C (248°F)
Tightening Torque
19.6 N·m
(14.4 lb-ft)
59 mm (2.322 in.)
M12 x 1.5 mm
19 mm (0.748 in.)
0006282
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